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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: wx/glcanvas.h | |
3 | // Purpose: wxGLCanvas base header | |
4 | // Author: Julian Smart | |
5 | // Modified by: | |
6 | // Created: | |
7 | // Copyright: (c) Julian Smart | |
8 | // RCS-ID: $Id$ | |
9 | // Licence: wxWindows licence | |
10 | ///////////////////////////////////////////////////////////////////////////// | |
11 | ||
12 | #ifndef _WX_GLCANVAS_H_BASE_ | |
13 | #define _WX_GLCANVAS_H_BASE_ | |
14 | ||
15 | #include "wx/defs.h" | |
16 | ||
17 | #if wxUSE_GLCANVAS | |
18 | ||
19 | #include "wx/app.h" | |
20 | #include "wx/palette.h" | |
21 | #include "wx/window.h" | |
22 | ||
23 | class WXDLLIMPEXP_FWD_GL wxGLCanvas; | |
24 | class WXDLLIMPEXP_FWD_GL wxGLContext; | |
25 | ||
26 | // ---------------------------------------------------------------------------- | |
27 | // Constants for attributes list | |
28 | // ---------------------------------------------------------------------------- | |
29 | ||
30 | // Notice that not all implementation support options such as stereo, auxiliary | |
31 | // buffers, alpha channel, and accumulator buffer, use IsDisplaySupported() to | |
32 | // check for individual attributes support. | |
33 | enum | |
34 | { | |
35 | WX_GL_RGBA = 1, // use true color palette (on if no attrs specified) | |
36 | WX_GL_BUFFER_SIZE, // bits for buffer if not WX_GL_RGBA | |
37 | WX_GL_LEVEL, // 0 for main buffer, >0 for overlay, <0 for underlay | |
38 | WX_GL_DOUBLEBUFFER, // use double buffering (on if no attrs specified) | |
39 | WX_GL_STEREO, // use stereoscopic display | |
40 | WX_GL_AUX_BUFFERS, // number of auxiliary buffers | |
41 | WX_GL_MIN_RED, // use red buffer with most bits (> MIN_RED bits) | |
42 | WX_GL_MIN_GREEN, // use green buffer with most bits (> MIN_GREEN bits) | |
43 | WX_GL_MIN_BLUE, // use blue buffer with most bits (> MIN_BLUE bits) | |
44 | WX_GL_MIN_ALPHA, // use alpha buffer with most bits (> MIN_ALPHA bits) | |
45 | WX_GL_DEPTH_SIZE, // bits for Z-buffer (0,16,32) | |
46 | WX_GL_STENCIL_SIZE, // bits for stencil buffer | |
47 | WX_GL_MIN_ACCUM_RED, // use red accum buffer with most bits (> MIN_ACCUM_RED bits) | |
48 | WX_GL_MIN_ACCUM_GREEN, // use green buffer with most bits (> MIN_ACCUM_GREEN bits) | |
49 | WX_GL_MIN_ACCUM_BLUE, // use blue buffer with most bits (> MIN_ACCUM_BLUE bits) | |
50 | WX_GL_MIN_ACCUM_ALPHA, // use alpha buffer with most bits (> MIN_ACCUM_ALPHA bits) | |
51 | WX_GL_SAMPLE_BUFFERS, // 1 for multisampling support (antialiasing) | |
52 | WX_GL_SAMPLES // 4 for 2x2 antialising supersampling on most graphics cards | |
53 | }; | |
54 | ||
55 | #define wxGLCanvasName _T("GLCanvas") | |
56 | ||
57 | // ---------------------------------------------------------------------------- | |
58 | // wxGLContextBase: OpenGL rendering context | |
59 | // ---------------------------------------------------------------------------- | |
60 | ||
61 | class WXDLLIMPEXP_GL wxGLContextBase : public wxObject | |
62 | { | |
63 | public: | |
64 | /* | |
65 | The derived class should provide a ctor with this signature: | |
66 | ||
67 | wxGLContext(wxGLCanvas *win, const wxGLContext *other = NULL); | |
68 | */ | |
69 | ||
70 | // set this context as the current one | |
71 | virtual bool SetCurrent(const wxGLCanvas& win) const = 0; | |
72 | }; | |
73 | ||
74 | // ---------------------------------------------------------------------------- | |
75 | // wxGLCanvasBase: window which can be used for OpenGL rendering | |
76 | // ---------------------------------------------------------------------------- | |
77 | ||
78 | class WXDLLIMPEXP_GL wxGLCanvasBase : public wxWindow | |
79 | { | |
80 | public: | |
81 | // default ctor doesn't initialize the window, use Create() later | |
82 | wxGLCanvasBase(); | |
83 | ||
84 | virtual ~wxGLCanvasBase(); | |
85 | ||
86 | ||
87 | /* | |
88 | The derived class should provide a ctor with this signature: | |
89 | ||
90 | wxGLCanvas(wxWindow *parent, | |
91 | wxWindowID id = wxID_ANY, | |
92 | int* attribList = 0, | |
93 | const wxPoint& pos = wxDefaultPosition, | |
94 | const wxSize& size = wxDefaultSize, | |
95 | long style = 0, | |
96 | const wxString& name = wxGLCanvasName, | |
97 | const wxPalette& palette = wxNullPalette); | |
98 | */ | |
99 | ||
100 | // operations | |
101 | // ---------- | |
102 | ||
103 | // set the given context associated with this window as the current one | |
104 | bool SetCurrent(const wxGLContext& context) const; | |
105 | ||
106 | // flush the back buffer (if we have it) | |
107 | virtual bool SwapBuffers() = 0; | |
108 | ||
109 | ||
110 | // accessors | |
111 | // --------- | |
112 | ||
113 | // check if the given attributes are supported without creating a canvas | |
114 | static bool IsDisplaySupported(const int *attribList); | |
115 | ||
116 | const wxPalette *GetPalette() const { return &m_palette; } | |
117 | ||
118 | // miscellaneous helper functions | |
119 | // ------------------------------ | |
120 | ||
121 | #ifndef wxHAS_OPENGL_ES | |
122 | // call glcolor() for the colour with the given name, return false if | |
123 | // colour not found | |
124 | bool SetColour(const wxString& colour); | |
125 | #endif | |
126 | ||
127 | // return true if the extension with given name is supported | |
128 | // | |
129 | // notice that while this function is implemented for all of GLX, WGL and | |
130 | // AGL the extensions names are usually not the same for different | |
131 | // platforms and so the code using it still usually uses conditional | |
132 | // compilation | |
133 | static bool IsExtensionSupported(const char *extension); | |
134 | ||
135 | // deprecated methods using the implicit wxGLContext | |
136 | #if WXWIN_COMPATIBILITY_2_8 | |
137 | wxDEPRECATED( wxGLContext* GetContext() const ); | |
138 | ||
139 | wxDEPRECATED( void SetCurrent() ); | |
140 | ||
141 | wxDEPRECATED( void OnSize(wxSizeEvent& event) ); | |
142 | #endif // WXWIN_COMPATIBILITY_2_8 | |
143 | ||
144 | #ifdef __WXUNIVERSAL__ | |
145 | // resolve the conflict with wxWindowUniv::SetCurrent() | |
146 | virtual bool SetCurrent(bool doit) { return wxWindow::SetCurrent(doit); }; | |
147 | #endif | |
148 | ||
149 | protected: | |
150 | // override this to implement SetColour() in GL_INDEX_MODE | |
151 | // (currently only implemented in wxX11 and wxMotif ports) | |
152 | virtual int GetColourIndex(const wxColour& WXUNUSED(col)) { return -1; } | |
153 | ||
154 | // create default palette if we're not using RGBA mode | |
155 | // (not supported in most ports) | |
156 | virtual wxPalette CreateDefaultPalette() { return wxNullPalette; } | |
157 | ||
158 | // check if the given extension name is present in the space-separated list | |
159 | // of extensions supported by the current implementation such as returned | |
160 | // by glXQueryExtensionsString() or glGetString(GL_EXTENSIONS) | |
161 | static bool IsExtensionInList(const char *list, const char *extension); | |
162 | ||
163 | wxPalette m_palette; | |
164 | ||
165 | #if WXWIN_COMPATIBILITY_2_8 | |
166 | wxGLContext *m_glContext; | |
167 | #endif // WXWIN_COMPATIBILITY_2_8 | |
168 | }; | |
169 | ||
170 | // ---------------------------------------------------------------------------- | |
171 | // wxGLApp: a special wxApp subclass for OpenGL applications which must be used | |
172 | // to select a visual compatible with the given attributes | |
173 | // ---------------------------------------------------------------------------- | |
174 | ||
175 | class WXDLLIMPEXP_GL wxGLAppBase : public wxApp | |
176 | { | |
177 | public: | |
178 | wxGLAppBase() : wxApp() { } | |
179 | ||
180 | // use this in the constructor of the user-derived wxGLApp class to | |
181 | // determine if an OpenGL rendering context with these attributes | |
182 | // is available - returns true if so, false if not. | |
183 | virtual bool InitGLVisual(const int *attribList) = 0; | |
184 | }; | |
185 | ||
186 | #if defined(__WXMSW__) | |
187 | #include "wx/msw/glcanvas.h" | |
188 | #elif defined(__WXMOTIF__) || defined(__WXX11__) | |
189 | #include "wx/x11/glcanvas.h" | |
190 | #elif defined(__WXGTK20__) | |
191 | #include "wx/gtk/glcanvas.h" | |
192 | #elif defined(__WXGTK__) | |
193 | #include "wx/gtk1/glcanvas.h" | |
194 | #elif defined(__WXMAC__) | |
195 | #include "wx/osx/glcanvas.h" | |
196 | #elif defined(__WXCOCOA__) | |
197 | #include "wx/cocoa/glcanvas.h" | |
198 | #else | |
199 | #error "wxGLCanvas not supported in this wxWidgets port" | |
200 | #endif | |
201 | ||
202 | // wxMac and wxMSW don't need anything extra in wxGLAppBase, so declare it here | |
203 | #ifndef wxGL_APP_DEFINED | |
204 | ||
205 | class WXDLLIMPEXP_GL wxGLApp : public wxGLAppBase | |
206 | { | |
207 | public: | |
208 | wxGLApp() : wxGLAppBase() { } | |
209 | ||
210 | virtual bool InitGLVisual(const int *attribList); | |
211 | ||
212 | private: | |
213 | DECLARE_DYNAMIC_CLASS(wxGLApp) | |
214 | }; | |
215 | ||
216 | #endif // !wxGL_APP_DEFINED | |
217 | ||
218 | #endif // wxUSE_GLCANVAS | |
219 | ||
220 | #endif // _WX_GLCANVAS_H_BASE_ |